break in restriction

Discussion in 'SRT Hellcat Performance' started by AlbertaBlackTop, Nov 4, 2015.

  1. AlbertaBlackTop

    AlbertaBlackTop Hellcat Member

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    There is a persistant rumour that the hemis are ecu restricted until after 3750 miles. I'm wondering if that is true for the hellcats? Has anyone noticed a performance gain after the 3750 mi mark?
     
  2. caren

    caren Hell-o Kitty

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    Speaking from Dyno experience when mine was below that threshold and tsc's was above it, if that were true it would explain the difference of 34 horsepower to the wheels between my Charger and his Challenger (647 vs. 681). Probably just a fluke though. :)
     
    Last edited: Nov 4, 2015
  3. AlbertaBlackTop

    AlbertaBlackTop Hellcat Member

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    That's a huge difference! Let's hope it's a break in thing.
     
  4. Garfield

    Garfield Hellcat Member

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    That would be a excessively high break in period.. Normally the breakin is for properly seating seals gaskets.. Getting lubes to soak into metals.. Proper hearing and cooling of sensors.. Etc.. With the testing our motors go through before leaving the plant that's a lot of miles.. One would assume that before testing they would need to breakin the motor before leaving.. Hydro fluids in trannys and such def don't need that much time..

    But hey in today's world anything is possible so I wouldn't put it past the electronic big brothers either.
     
  5. Carnage

    Carnage SRT Hellcat Supercharged Moderator Staff Member Hellcat Car Club Gold Supporting Member HCC Charter Member

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    i noticed louder sound and throttle power somewhat after my 2nd oil change around 1800 miles.
     
    • Agree Agree x 1
  6. Plum 16

    Plum 16 Silver Member

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    On previous LX's I had been told that it was governed by total hours. I thought it was like 100
     
  7. AlbertaBlackTop

    AlbertaBlackTop Hellcat Member

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    I found this pic. It's for the 5.7, but I'm wondering if the hellcat has something similar. image.jpeg
     
  8. Garfield

    Garfield Hellcat Member

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    I would attribute that to cats mufflers resonators expanding and contracting after being heater and cooled a few times.. An Hourly restriction would actually be more logical to me. But 100 hours would be 4500-6k miles for the average driver.
     
  9. Plum 16

    Plum 16 Silver Member

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    Time could be less. Just from recollection.
     

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